Barnes and Noble and Kobo are two major players in the digital book space and in recent years have been slowly producing more tablets than dedicated e-readers. (goodereader.com)
iStoryTime has been a major player in the digital book space with their primary business model centered around kids content. (goodereader.com)
What this diagram illustrates is how diverse the digital book space is and how far some of the emergent forms move away from the codex. (theliteraryplatform.com)